package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {
    @Autowired
    private WeChatProperties wechatProperties;
    @Autowired
    private UserMapper userMapper;

    //微信服务接口地址
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
    //微信登录
    @Override
    public User wxlogin(UserLoginDTO userLoginDTO) {
        //调用微信的接口，获取微信用户的openid
        String openid = getOpenid(userLoginDTO.getCode());
        //判断openid是否为空，如果为空则登录失败，抛出业务异常
        if(openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);//登录失败
        }
        //判断当前是否为新用户
        User user = userMapper.getByOpenid(openid);
        //如果是新用户，自动完成注册
        if(user == null){
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        return user;//返回这个用户对象
    }
    private String getOpenid(String code){
        Map<String, String> map=new HashMap<>();
        map.put("appid", wechatProperties.getAppid());
        map.put("secret", wechatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        //因为json字符串获得不到里面属性，解析成jsonobject对象就好处理一些
        JSONObject jsonObject = JSONObject.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
